The Bell Tower originally housed a huge iron bell. But because its tolling was not loud enough, this was replaced by a massive cast bronze bell over 10 inches thick that is in perfect condition today. The iron bell was moved to the back of the Drum Tower where it has remained for over 500 years. As recently as 1924, the bronze bell could be heard ringing out the 7:00 p.m. chime from a distance of over 20 kilometers.
According to legend, an official named Deng tried unsuccessfully for over a year to cast the bell. On the eve of the final casting, his daughter, fearing that further delays and loss of working time would bring blame on her father, decided to sacrifice her life in order to move the gods to bring about a perfect casting, and so she threw herself into the molten bronze. Her panic-stricken father could only recover a single embroidered slipper from the flames. The casting was a success and the emperor, moved by the young girl's spirit of sacrifice, named her the "Goddess of the Golden Furnace" and built a temple in her honor near the foundry. By the ordinary people she was remembered as the "Goddess Who Cast the Bell."